Class 12 Biology Important Chapter 13 Organisms and Populations Solutions English Medium As Per The New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 12 Biology Important Solutions in English and select need one. AHSEC Class 12 Biology Additional Notes Download PDF. HS 2nd Year Biology Additional Solutions.
Class 12 Biology Important Chapter 13 Organisms and Populations
Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 12 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 2nd Year Biology Important Solutions English Medium for All Chapters, You can practice these here.
Organisms and Populations
Chapter: 13
| IMPORTANT QUESTION AND ANSWER |
Answer the Following Question:
1. What is ecology?
Ans: Ecology is the study of the interactions between organisms and their environment (both biotic and abiotic components).
2. What is an age pyramid?
Ans: An age pyramid is a graphical representation of the age distribution in a population, showing the proportion of individuals in various age groups.
3. What is carrying capacity (K)?
Ans: Carrying capacity is the maximum number of individuals an environment can support without degradation.
4. What does “r-strategy” refer to?
Ans: r-strategy refers to a reproductive strategy where organisms produce a large number of offspring with little parental care (e.g., oysters).
5. What is resource partitioning?
Ans: Resource partitioning is when two species divide resources to avoid competition, enabling them to coexist.
6. What is the significance of age pyramids in population studies?
Ans: Age pyramids represent the age distribution of individuals in a population. They help determine whether a population is growing, stable, or declining by showing the proportions of individuals in different age groups.
7. Explain the concept of natality and its role in population growth.
Ans: Natality refers to the number of births in a population over a given time period. It contributes to population growth by increasing the number of individuals within a population.
8. Explain the concept of logistic growth.
Ans: Logistic growth occurs when population growth slows as it approaches the environment’s carrying capacity. The growth follows an S-shaped curve, where initially the population grows rapidly, but it slows as resources become limited.
9. Explain the Competitive Exclusion Principle.
Ans: The Competitive Exclusion Principle states that two species competing for the same resources cannot coexist indefinitely. The more efficient species will outcompete the other, leading to the exclusion of the weaker species.
10. What is parasitism and how does it affect the host?
Ans: Parasitism is an interaction where one organism (the parasite) benefits at the expense of the host. It can weaken the host by reducing its survival, growth, and reproduction, and sometimes making it more susceptible to predators.
11. What are the effects of competition on population dynamics?
Ans: Competition between species or individuals for limited resources can reduce the fitness of the competing organisms, leading to a decrease in population size for the less competitive species, or driving them to extinction.
12. Describe the process of co-evolution in mutualistic relationships.
Ans: Co-evolution occurs when two species evolve in response to each other’s adaptations over time. In mutualism, this often results in specialized features that benefit both partners, such as plants evolving flowers adapted to specific pollinators.
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